复杂近地表初至波层析反演静校正技术研究  

Tomography inversion by first breaks in areas with complex near surface

作　　者：张林[1] 杨勤勇[1] 张兵[1,2] 郭立鹏[1,3] 

机构地区：[1]中国石油化工股份有限公司石油物探技术研究院,南京211103 [2]同济大学海洋与地球科学学院海洋地质国家重点实验室,上海200092 [3]中国石油大学(华东)地球科学与技术学院,青岛266580

出　　处：《地球物理学进展》2017年第2期816-821,共6页Progress in Geophysics

摘　　要：山前带、黄土塬等复杂近地表地区已成为目前勘探的重点,因其地表起伏剧烈、高差严重等的现象,近地表建模技术严重影响着静校正的准确性.近地表速度建模的方法有很多,包括层析法,折射法,面波法等,旅行时层析法是目前速度建模的一种准确高效的方法,其基于射线理论,利用地震波旅行时信息来反演地下速度.本文利用初至旅行时层析进行近地表建模,并在起伏异常体模型上进行了近地表建模,模型测试说明了本文中方法在山前带等复杂近地表地区进行静校正等的有效性.Foothill zones which bear complex near surface conditions have become targeted exploration areas in recent years. Due to its strongly rugged surface、severe elevation difference and other features, an accurate model building technique is badly needed, which has great impact on static in these areas. There are many near surface model building methods, such as tomography, refraction, etc. Travel-time tomography is an efficient and precise method for near surface model building. Based on ray propagation theory, it uses seismic wave travel-times to invert medium velocity. In this paper, the author applied first-break travel-time tomography to near surface model building and model tests have shown that the method is effective and robust in near surface model building of complicated medium.

关 键 词：近地表 层析反演 初至 

分 类 号：P631[天文地球—地质矿产勘探]